RTF malware analysis — malicious · c5117d305454ed1a

MALICIOUS

RTF

9.6 KB

MD5: 77fb6c90ee9d65248e3493cee1eccfff SHA-1: fd085b0dd95f237dd6c35ba02a68dee4541c9b69 SHA-256: c5117d305454ed1aefc0288753b4d15f345086de1c58abb2a95be78af8a5d04a

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains OLE object data and specifically triggers heuristics related to Equation Editor exploits and OLE object activation. This indicates a likely attempt to exploit a known vulnerability, such as CVE-2017-11882, to execute embedded code. The presence of an embedded OLE object further supports the attack vector of exploiting a vulnerable component within the document to achieve code execution, likely for downloading a secondary payload.

Heuristics 3

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001086.bin` `ffd689076796960f9fedb46f39aaeb7349bf4b947b5577cd620209f9ddf50b87`	rtf-objdata-decoded	RTF \objdata at offset 0x1086	2027 bytes

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